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2.5.20. `mysql_field_len`

mysql_field_len
Returns the length of the specified field

Warning

This extension is deprecated as of PHP 5.5.0, and will be removed in the future. Instead, the MySQLi or PDO_MySQL extension should be used. See also MySQL: choosing an API guide and related FAQ for more information. Alternatives to this function include:

mysqli_fetch_field_direct [length]

PDOStatement::getColumnMeta [len]

Description

int mysql_field_len(resource result,
                    int field_offset);

mysql_field_len returns the length of the specified field.

Parameters

result: The result resource that is being evaluated. This result comes from a call to mysql_query.
field_offset: The numerical field offset. The field_offset starts at 0. If field_offset does not exist, an error of level E_WARNING is also issued.

Return Values

The length of the specified field index on success or FALSE on failure.

Examples

Example 2.28. mysql_field_len example

<?php
$result = mysql_query("SELECT id,email FROM people WHERE id = '42'");
if (!$result) {
    echo 'Could not run query: ' . mysql_error();
    exit;
}
// Will get the length of the id field as specified in the database
// schema. 
$length = mysql_field_len($result, 0);
echo $length;
?>

Notes

Note

For backward compatibility, the following deprecated alias may be used: mysql_fieldlen

See Also

mysql_fetch_lengths

strlen

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